201994 has 16 divisors (see below), whose sum is σ = 346248. Its totient is φ = 87552.

The previous prime is 201979. The next prime is 201997. The reversal of 201994 is 499102.

It can be written as a sum of positive squares in 4 ways, for example, as 190969 + 11025 = 437^2 + 105^2 .

It is not an unprimeable number, because it can be changed into a prime (201997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214 + ... + 670.

2²⁰¹⁹⁹⁴ is an apocalyptic number.

201994 is a deficient number, since it is larger than the sum of its proper divisors (144254).

201994 is a wasteful number, since it uses less digits than its factorization.

201994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 201994 is about 449.4374261229. The cubic root of 201994 is about 58.6740621416.

The spelling of 201994 in words is "two hundred one thousand, nine hundred ninety-four".